Form:
- Positive form: Subject + have/has + verb 3
- Negative form: Subject + have/has + not + verb 3
- Question form: Have/Has + subject + verb 3 ?
Usage:
Present Perfect Simple is used to show/talk about:
a. Things that happened at an indefinite time in the past
For examples,
- I have met him before.
- They have taken the exam.
- She has finished her homework.
For examples,
- She bought a new bike last week. (Correct)
- She has bought a new bike last week. (Incorrect)
ករណីទី ១-- យើងប្រើ present perfect simple ដើម្បីបង្ហាញ ឬនិយាយពី សកម្មភាព មួយ ដែលកើតឡើង នៅពេល វេលាមិនជាក់លាក់ណា មួយ នៅក្នុងអតីតកាល។ គួរកត់សំគាល់ថា បើយើង ដឹងពីពេលវេលា ជាក់លាក់ដែល សកម្មភាព នោះកើតឡើងវិញនោះ យើងមិនត្រូវប្រើ present perfect simple ប៉ុន្តែ ត្រូវប្រើ past simple ជំនួសវិញ។
b. Things that started in the past have continued up to now.
For examples,
- We have known each other since we were in high school.
- They have lived here for five years.
- She has worked on the computer since six this morning.
ករណីទី ២-- យើងប្រើ present perfect simple ដើម្បីបង្ហាញ ឬ និយាយអំពី សកម្មភាព មួយ ដែល កើតឡើងនៅ ក្នុងអតីតកាល ហើយបានបន្តមក ដល់បច្ចុប្បន្នកាល។
c. Things that happened in the past and you can see the result now (past actions with present results)
For examples,
- He has washed his car. (= It is clean.)
- They have spent all of their money. (= They are broke.)
- John has painted his house. (= It looks nice.)
ករណីទី ៣-- យើងប្រើ present perfect simple ដើម្បីបង្ហាញ ឬ និយាយអំពី សកម្មភាព មួយដែល កើតឡើង នៅក្នុងអតីតកាល ប៉ុន្តែមានលទ្ធផល នៅក្នុងបច្ចុប្បន្ន។
d. Experiences (i.e. something that we have done or have never done in the past)
For examples,
- We have never been to any place together before.
- It’s the most beautiful village I have ever been to.
- I have never driven a Mercedes.
